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Joel Michael Reynolds (born 1985) is an American philosopher whose research focuses on disability. [1] Their areas of specialization include Philosophy of Disability, Bioethics, Continental Philosophy, and Social Epistemology. [2]
Phenomenology is commonly applied to the field of particle physics, where it forms a bridge between the mathematical models of theoretical physics (such as quantum field theories and theories of the structure of space-time) and the results of the high-energy particle experiments.
The true speed of the target may be folded by a modulo operation produced by the sampling process. T r u e V e l o c i t y = A m b i g u o u s V e l o c i t y + 0.5 × N ( P R F × C T r a n s m i t F r e q u e n c y ) {\displaystyle True\ Velocity=Ambiguous\ Velocity+0.5\times N\left({\frac {PRF\times C}{Transmit\ Frequency}}\right)}
Ground targets further than this range cannot be detected, so the PRF can be quite high; a radar with a PRF of 7.5 kHz will return ambiguous echoes from targets at about 20 km, or over the horizon. If however, the PRF was doubled to 15 kHz, then the ambiguous range is reduced to 10 km and targets beyond this range would only appear on the ...
However, since humans reflect far less radar energy than metal does, these systems require sophisticated technology to isolate human targets and moreover to process any sort of detailed image. Through-the-wall radars can be made with Ultra Wideband impulse radar, micro-Doppler radar, and synthetic aperture radar (SAR). [5] Imaging radar; 3D radar
Radar can also merge with other sensors to give even more information, such as moving target indicator. Radar generally must acquire its images from an angle, which often means that it can look into the sides of buildings, producing a movie-like record over time, and being able to form three-dimensional views over time.
Radar angels are an effect seen on radar displays when there is a periodic structure in the view of the radar that is roughly the same length as the signal's wavelength.The angel appears to be a physically huge object on the display, often miles across, that can obscure real targets.
Radar astronomy is a technique of observing nearby astronomical objects by reflecting radio waves or microwaves off target objects and analyzing their reflections. Radar astronomy differs from radio astronomy in that the latter is a passive observation (i.e., receiving only) and the former an active one (transmitting and receiving).